成员的完整列表，这些成员属于 NIMQChatChannelCategoryMemberRole,包括所有继承而来的类成员

	accid	NIMQChatChannelCategoryMemberRole
	auths	NIMQChatChannelCategoryMemberRole
	avatar	NIMQChatChannelCategoryMemberRole
	categoryId	NIMQChatChannelCategoryMemberRole
	createTime	NIMQChatChannelCategoryMemberRole
	custom	NIMQChatChannelCategoryMemberRole
	inviter	NIMQChatChannelCategoryMemberRole
	joinTime	NIMQChatChannelCategoryMemberRole
	nick	NIMQChatChannelCategoryMemberRole
	roleId	NIMQChatChannelCategoryMemberRole
	serverId	NIMQChatChannelCategoryMemberRole
	type	NIMQChatChannelCategoryMemberRole
	updateTime	NIMQChatChannelCategoryMemberRole